Merge branch 'perf/urgent' into perf/core, to pick up fixes and to refresh to v4.15

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 8 insertions, 32 deletions

diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index b93efc8feecd..3b0ba54cc4d5 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  debugfs.h - a tiny little debug file system
  *
  *  Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
  *  Copyright (C) 2004 IBM Inc.
  *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License version
- *	2 as published by the Free Software Foundation.
- *
  *  debugfs is for people to use instead of /proc or /sys.
  *  See Documentation/filesystems/ for more details.
  */
@@ -23,7 +20,6 @@
 
 struct device;
 struct file_operations;
-struct srcu_struct;
 
 struct debugfs_blob_wrapper {
 	void *data;
@@ -43,25 +39,6 @@ struct debugfs_regset32 {
 
 extern struct dentry *arch_debugfs_dir;
 
-extern struct srcu_struct debugfs_srcu;
-
-/**
- * debugfs_real_fops - getter for the real file operation
- * @filp: a pointer to a struct file
- *
- * Must only be called under the protection established by
- * debugfs_use_file_start().
- */
-static inline const struct file_operations *debugfs_real_fops(const struct file *filp)
-	__must_hold(&debugfs_srcu)
-{
-	/*
-	 * Neither the pointer to the struct file_operations, nor its
-	 * contents ever change -- srcu_dereference() is not needed here.
-	 */
-	return filp->f_path.dentry->d_fsdata;
-}
-
 #define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt)		\
 static int __fops ## _open(struct inode *inode, struct file *file)	\
 {									\
@@ -107,10 +84,10 @@ struct dentry *debugfs_create_automount(const char *name,
 void debugfs_remove(struct dentry *dentry);
 void debugfs_remove_recursive(struct dentry *dentry);
 
-int debugfs_use_file_start(const struct dentry *dentry, int *srcu_idx)
-	__acquires(&debugfs_srcu);
+const struct file_operations *debugfs_real_fops(const struct file *filp);
 
-void debugfs_use_file_finish(int srcu_idx) __releases(&debugfs_srcu);
+int debugfs_file_get(struct dentry *dentry);
+void debugfs_file_put(struct dentry *dentry);
 
 ssize_t debugfs_attr_read(struct file *file, char __user *buf,
 			size_t len, loff_t *ppos);
@@ -239,15 +216,14 @@ static inline void debugfs_remove(struct dentry *dentry)
 static inline void debugfs_remove_recursive(struct dentry *dentry)
 { }
 
-static inline int debugfs_use_file_start(const struct dentry *dentry,
-					int *srcu_idx)
-	__acquires(&debugfs_srcu)
+const struct file_operations *debugfs_real_fops(const struct file *filp);
+
+static inline int debugfs_file_get(struct dentry *dentry)
 {
 	return 0;
 }
 
-static inline void debugfs_use_file_finish(int srcu_idx)
-	__releases(&debugfs_srcu)
+static inline void debugfs_file_put(struct dentry *dentry)
 { }
 
 static inline ssize_t debugfs_attr_read(struct file *file, char __user *buf,